The working principle of the injection moulding machine is similar to that of the injector used for injection. It is a process of injecting the graininess of plasticized metal material (i.e. viscous flow state) into the closed cavity with the help of the screw (or plunger) to obtain the product after solidification and shaping.
Injection molding is a cyclic process, each cycle mainly includes: quantitative feeding - melt plasticization - pressure injection - filling cooling - opening parts. After removing the plastic parts, the mould is closed again for the next cycle.
Injection Molding Machine Operating Project: Injection Molding Machine Operating Project includes control keyboard operation, electrical control system operation and hydraulic system operation. The selection of injection process action, feeding action, injection pressure, injection speed, ejection type, temperature monitoring of each section of the barrel, injection pressure and back pressure adjustment are carried out respectively.
Generally, the forming process of screw injection moulding machine is as follows: firstly, the granular or powdery plastic is added into the barrel, and then the plastic is melted by the rotation of the screw and the heating of the outer wall of the barrel. Then the machine closes the mould and moves the injection seat forward to make the nozzle close to the gate of the mould, and then the injection cylinder is injected with pressure oil to push the screw forward with high pressure and speed. The speed will inject the melt into the closed die with lower temperature, after a certain period of time and pressure (also known as holding pressure) and cooling to make it solidified, the product can be removed from the open die (holding pressure is designed to prevent the reflux of the melt in the die cavity, to supplement the material to the die cavity, and to ensure that the product has a certain density and size tolerance). The basic requirements of injection moulding are plasticization, injection and moulding. Plasticization is the precondition to realize and guarantee the quality of moulded products. In order to meet the requirements of moulding, injection must ensure sufficient pressure and speed. At the same time, due to the high injection pressure, the corresponding high pressure in the cavity (the average pressure in the cavity is usually between 20 and 45 MPa), so it must have enough clamping force. Therefore, injection device and clamping device are the key parts of injection moulding machine.
Harber MIM focuses on R&D and manufacturing of simple or complex metallic parts, MIM solution services and associated MIM injection molds. Being a professional player in PIM & MIM (powder & metal injection molding) technology in China, we have managed to develop our skills and get stronger all the time. Now we can assure to maintain high and stable quality for our PIM & MIM products to meet requirements of our clients worldwide.
Harber MIM has a 5000 squaremeters first-class MIM workshop now after deep ploughing many years in the industry. Our 100+ trained & energetic employees are integrated each MIM process like: MIM design, mold design, tool making, debinding, sintering, and surface finishing into final MIM parts inspection and assemble operations.
To speed up the products launch,Harber MIM built the MIM molding tools indoor.We are equipped with advanced facilities imported from Germany, Japan and Switzerland.We can guaranttee the precision of molds and assure tolearance and high efficiency of manufacturing with short lead time.
Some of our products have been used for tools, hardwares, electronic appliances, locks, toys, automobile parts, fasteners, spinning parts and so on.
